feat: redesign run history views

UI-DESIGN.md

@@ -2,7 +2,7 @@
 
 ## 1. 目的与适用范围
 
-本文定义 GoodBuddy 桌面端的统一界面规则，适用于聊天与最近对话、知识库、智能心跳、任务与活动记录，以及后续新增的一级页面。
+本文定义 GoodBuddy 桌面端的统一界面规则，适用于聊天与最近对话、知识库、智能心跳、运行记录，以及后续新增的一级页面。
 
 设计系统解决两类问题：
 
@@ -501,13 +501,13 @@ GoodBuddy 是可调整窗口大小的桌面应用。响应式设计优先保证
 - 状态卡片使用统一状态令牌，不只依赖颜色。
 - 运行历史与配置使用明确区块，不以多套相似页签混合导航、开关和筛选。
 
-### 13.5 任务与活动
+### 13.5 运行记录
 
-- 任务使用 `standard` 壳层，活动记录使用 `dashboard` 壳层。
+- 使用 `dashboard` 壳层，并通过 `PageTabs` 提供“任务与会话 / 活动时间线 / 用量统计”三个同级视图。
-- “任务 / 活动”作为同级页面时使用 `PageTabs`。
+- 默认视图按“项目 → 任务或会话 → 活动详情”组织，项目范围持续可见，任务或会话详情可以折叠。
-- 任务状态筛选使用 `SegmentedControl` 或筛选工具栏，不再模拟页签。
+- 活动时间线按项目分组、按任务或会话建立横向轨道，所有轨道共享同一执行顺序并按事件时间排列，以带身份名称的节点表达用户、主 Agent、子专家、工具、审批、状态和并行关系；选择节点后显示所属会话、不可变范围快照和完整详情。
-- 活动记录保留审计字段和范围，支持独立容器横向滚动。
+- 用量统计与活动记录分离，支持按项目、会话和模型切换统计维度，宽表格在独立容器内横向滚动。
-- 批量停止、删除和清空历史遵循破坏性操作政策。
+- 活动状态筛选使用 `SegmentedControl`，不与页面页签混合。清空历史遵循破坏性操作政策。
 
 ### 13.6 魔法笔记
 

src/renderer/src/ActivityPanel.test.tsx

@@ -81,7 +81,7 @@ describe('ActivityPanel', () => {
     await i18n.changeLanguage('zh-CN')
   })
 
-  it('renders English interface copy while preserving activity content', async () => {
+  it('renders localized tabs and keeps usage separate from activity', async () => {
     await i18n.changeLanguage('en-US')
     const record = makeRecord(1, 'running')
     render(
@@ -102,19 +102,67 @@ describe('ActivityPanel', () => {
     }).format(new Date(record.createdAt))
     expect(screen.getAllByText(englishDate).length).toBeGreaterThan(0)
     expect(
-      screen.getByRole('heading', {
+      screen.getByRole('heading', { level: 1, name: 'Run history' })
-        level: 1,
-        name: 'Tasks and activity'
-      })
     ).toBeInTheDocument()
     expect(
-      screen.getByRole('button', { name: 'In progress' })
+      screen.getByRole('tab', { name: 'Tasks and conversations' })
-    ).toBeInTheDocument()
+    ).toHaveAttribute('aria-selected', 'true')
     expect(screen.getByText(record.title)).toBeInTheDocument()
+    expect(screen.queryByText('Token usage')).not.toBeInTheDocument()
+
+    fireEvent.click(
+      screen.getByRole('tab', { name: 'Usage analytics' })
+    )
     expect(screen.getByText('Token usage')).toBeInTheDocument()
+    expect(screen.queryByText(record.title)).not.toBeInTheDocument()
   })
 
-  it('filters active and unsuccessful activity and opens its conversation', () => {
+  it('organizes records by project, conversation, and detail', () => {
+    const request: ActivityRecord = {
+      ...makeRecord(1, 'running'),
+      kind: 'request',
+      title: '分析登录问题',
+      scope: {
+        kind: 'project',
+        projectId: 'project-1',
+        projectName: '项目甲'
+      }
+    }
+    const tool: ActivityRecord = {
+      ...makeRecord(2),
+      conversationId: request.conversationId,
+      requestId: request.requestId,
+      title: '搜索 IPC 代码',
+      scope: request.scope
+    }
+    const { container } = render(
+      <ActivityPanel
+        onClear={vi.fn()}
+        onOpenConversation={vi.fn()}
+        records={[request, tool, makeRecord(3)]}
+        tokenUsage={makeTokenUsage()}
+      />
+    )
+
+    expect(container.querySelectorAll('.activity-project')).toHaveLength(2)
+    expect(screen.getByText('项目：项目甲')).toBeInTheDocument()
+    expect(
+      screen.getByText('1 个任务或会话 · 2 条活动')
+    ).toBeInTheDocument()
+
+    const projectConversation = screen
+      .getByText('对话：分析登录问题')
+      .closest('details')
+    expect(projectConversation).not.toBeNull()
+    expect(projectConversation).not.toHaveAttribute('open')
+    fireEvent.click(screen.getByText('对话：分析登录问题'))
+    expect(projectConversation).toHaveAttribute('open')
+    expect(
+      projectConversation?.querySelectorAll('article')
+    ).toHaveLength(2)
+  })
+
+  it('filters active and exceptional activity and opens its conversation', () => {
     const onOpenConversation = vi.fn()
     render(
       <ActivityPanel
@@ -131,16 +179,15 @@ describe('ActivityPanel', () => {
     )
 
     fireEvent.click(screen.getByRole('button', { name: '进行中' }))
-    fireEvent.click(screen.getByText('对话：活动 1'))
+    expect(screen.getByText('对话：活动 1')).toBeInTheDocument()
-    expect(screen.getByText('活动 1')).toBeInTheDocument()
     expect(screen.queryByText('活动 2')).not.toBeInTheDocument()
 
-    fireEvent.click(screen.getByRole('button', { name: '失败' }))
+    fireEvent.click(screen.getByRole('button', { name: '异常' }))
-    fireEvent.click(screen.getByText('对话：活动 2'))
+    expect(screen.getByText('对话：活动 2')).toBeInTheDocument()
-    expect(screen.getByText('活动 2')).toBeInTheDocument()
+    expect(screen.getByText('对话：活动 3')).toBeInTheDocument()
-    expect(screen.getByText('活动 3')).toBeInTheDocument()
     expect(screen.queryByText('活动 1')).not.toBeInTheDocument()
 
+    fireEvent.click(screen.getByText('对话：活动 2'))
     fireEvent.click(
       screen.getAllByRole('button', { name: '打开所属对话' })[0]!
     )
@@ -236,35 +283,7 @@ describe('ActivityPanel', () => {
     expect(within(item).getByText('进行中')).toBeInTheDocument()
   })
 
-  it('groups activity by conversation in collapsible sections', () => {
+  it('shows immutable project and unavailable scope snapshots', () => {
-    const first = makeRecord(1, 'running')
-    const second = {
-      ...makeRecord(2, 'failed'),
-      conversationId: first.conversationId
-    }
-    const { container } = render(
-      <ActivityPanel
-        onClear={vi.fn()}
-        onOpenConversation={vi.fn()}
-        records={[first, second]}
-        tokenUsage={makeTokenUsage()}
-      />
-    )
-
-    const groups =
-      container.querySelectorAll<HTMLDetailsElement>(
-        'details.activity-group'
-      )
-    expect(groups).toHaveLength(1)
-    expect(groups[0]).not.toHaveAttribute('open')
-    expect(within(groups[0]!).getByText('2 条活动')).toBeInTheDocument()
-
-    fireEvent.click(within(groups[0]!).getByText('对话：活动 1'))
-    expect(groups[0]).toHaveAttribute('open')
-    expect(groups[0]!.querySelectorAll('article')).toHaveLength(2)
-  })
-
-  it('shows immutable scope snapshots on groups and records', () => {
     const projectRecord: ActivityRecord = {
       ...makeRecord(1),
       scope: {
@@ -286,11 +305,11 @@ describe('ActivityPanel', () => {
       />
     )
 
-    expect(screen.getAllByText('项目：项目甲')).toHaveLength(2)
+    expect(screen.getByText('项目：项目甲')).toBeInTheDocument()
-    expect(screen.getAllByText('范围不可用')).toHaveLength(2)
+    expect(screen.getByText('范围不可用')).toBeInTheDocument()
   })
 
-  it('uses the shared page hierarchy and explicit global scope', () => {
+  it('uses shared page tabs and explicit global scope', () => {
     render(
       <ActivityPanel
         onClear={vi.fn()}
@@ -301,15 +320,102 @@ describe('ActivityPanel', () => {
     )
 
     expect(
-      screen.getByRole('heading', { level: 1, name: '任务与活动' })
+      screen.getByRole('heading', { level: 1, name: '运行记录' })
     ).toBeInTheDocument()
     expect(screen.getByText('全部项目')).toHaveClass('scope-badge')
-    expect(screen.getByLabelText('Token 用量分组')).toHaveClass(
+    expect(screen.getByLabelText('运行记录视图')).toHaveClass(
-      'segmented-control'
+      'page-tabs'
     )
+    expect(
+      screen.getByRole('tabpanel', { name: '任务与会话' })
+    ).toBeInTheDocument()
     expect(screen.getByLabelText('筛选活动')).toHaveClass(
       'segmented-control'
     )
+    expect(
+      screen.queryByLabelText('Token 用量分组')
+    ).not.toBeInTheDocument()
+  })
+
+  it('renders shared-time project and conversation activity tracks', () => {
+    const first: ActivityRecord = {
+      ...makeRecord(1, 'running'),
+      kind: 'request',
+      title: '分析登录问题',
+      scope: {
+        kind: 'project',
+        projectId: 'project-1',
+        projectName: '项目甲'
+      }
+    }
+    const second: ActivityRecord = {
+      ...makeRecord(2, 'failed'),
+      conversationId: first.conversationId,
+      requestId: first.requestId,
+      scope: first.scope
+    }
+    const third: ActivityRecord = {
+      ...makeRecord(3),
+      conversationId: 'conversation-parallel',
+      requestId: 'request-parallel',
+      kind: 'subagent',
+      title: '研究专家',
+      scope: first.scope
+    }
+    const fourth: ActivityRecord = {
+      ...makeRecord(4),
+      conversationId: first.conversationId,
+      requestId: first.requestId,
+      kind: 'result',
+      title: '任务执行完成',
+      scope: first.scope
+    }
+    render(
+      <ActivityPanel
+        onClear={vi.fn()}
+        onOpenConversation={vi.fn()}
+        records={[first, second, third, fourth]}
+        tokenUsage={makeTokenUsage()}
+      />
+    )
+
+    fireEvent.click(screen.getByRole('tab', { name: '活动时间线' }))
+    const timeline = screen.getByLabelText(
+      '按项目和会话分组的并行活动轨道'
+    )
+    expect(timeline).toHaveClass('activity-tracks')
+    expect(
+      timeline.querySelectorAll('.activity-track')
+    ).toHaveLength(2)
+    expect(
+      timeline.querySelectorAll('.activity-track__node')
+    ).toHaveLength(4)
+    expect(within(timeline).getByText('分析登录问题')).toBeInTheDocument()
+    expect(
+      within(timeline).getAllByText('研究专家').length
+    ).toBeGreaterThan(0)
+    expect(within(timeline).getAllByText('用户').length).toBeGreaterThan(0)
+    expect(
+      within(timeline).getAllByText('GoodBuddy').length
+    ).toBeGreaterThan(0)
+    expect(within(timeline).getByText('项目：项目甲')).toBeInTheDocument()
+    expect(
+      within(timeline).getByText(
+        '所有轨道共享同一执行顺序，节点按发生时间依次展开，点击节点查看身份和活动详情。'
+      )
+    ).toBeInTheDocument()
+
+    fireEvent.click(
+      screen.getByRole('button', {
+        name: /工具，失败，活动 2/u
+      })
+    )
+    const detail = screen.getByLabelText('选中的活动节点详情')
+    expect(within(detail).getByText('活动 2')).toBeInTheDocument()
+    expect(
+      within(detail).getByText('对话：分析登录问题')
+    ).toBeInTheDocument()
+    expect(within(detail).getByText('项目：项目甲')).toBeInTheDocument()
   })
 
   it('never renders more than 500 records', () => {
@@ -339,11 +445,10 @@ describe('ActivityPanel', () => {
         tokenUsage={makeTokenUsage()}
       />
     )
+    fireEvent.click(screen.getByRole('tab', { name: '用量统计' }))
 
     const stats = screen.getByLabelText('Token 用量统计')
-    expect(
+    expect(within(stats).getByText('150')).toBeInTheDocument()
-      within(stats).getByText('150')
-    ).toBeInTheDocument()
 
     const projectRow = screen.getByRole('row', {
       name: '项目甲gpt-5 · openai 100 20 10 40 120'
@@ -354,7 +459,7 @@ describe('ActivityPanel', () => {
     ).not.toBeInTheDocument()
   })
 
-  it('groups token usage and displays fallback labels', () => {
+  it('groups token usage by project, conversation, and model', () => {
     render(
       <ActivityPanel
         onClear={vi.fn()}
@@ -363,6 +468,7 @@ describe('ActivityPanel', () => {
         tokenUsage={makeTokenUsage()}
       />
     )
+    fireEvent.click(screen.getByRole('tab', { name: '用量统计' }))
 
     expect(screen.getByText('项目甲')).toBeInTheDocument()
     expect(screen.getByText('未归属项目')).toBeInTheDocument()

src/renderer/src/App.test.tsx

@@ -3067,10 +3067,13 @@ describe('App', () => {
       throw new Error('Missing request')
     }
 
-    fireEvent.click(screen.getByText('任务与活动'))
+    fireEvent.click(screen.getByText('运行记录'))
+    fireEvent.click(
+      await screen.findByRole('tab', { name: '用量统计' })
+    )
     const stats = await screen.findByLabelText('Token 用量统计')
     expect(
-      screen.getByRole('heading', { level: 1, name: '任务与活动' })
+      screen.getByRole('heading', { level: 1, name: '运行记录' })
     ).toBeInTheDocument()
     expect(
       screen.queryByRole('button', { name: /^专家角色：/u })
@@ -3841,7 +3844,7 @@ describe('App', () => {
     )
     expect(cancelledDot).toHaveClass('message__status-dot')
     expect(cancelledDot).not.toHaveClass('message__status-dot--active')
-    fireEvent.click(screen.getByText('任务与活动'))
+    fireEvent.click(screen.getByText('运行记录'))
     expect((await screen.findAllByText('已取消')).length).toBeGreaterThan(0)
     fireEvent.click(screen.getByRole('button', { name: '进行中' }))
     expect(
@@ -5170,7 +5173,7 @@ describe('App', () => {
     expect(within(statusRegion).getByText('已取消')).toBeInTheDocument()
     expect(within(statusRegion).getByText('父任务已停止')).toBeInTheDocument()
 
-    fireEvent.click(screen.getByText('任务与活动'))
+    fireEvent.click(screen.getByText('运行记录'))
     expect(await screen.findAllByText('子专家')).toHaveLength(4)
     expect(screen.getAllByText(/智能路由/u).length).toBeGreaterThan(0)
     expect(screen.getAllByText(/手动指定/u).length).toBeGreaterThan(0)

src/renderer/src/i18n/locales/en-US/activity.ts

@@ -3,10 +3,16 @@ import type { activity as chineseActivity } from '../zh-CN/activity'
 
 export const activity = {
   header: {
-    eyebrow: 'ACTIVITY AUDIT',
+    eyebrow: 'RUN HISTORY',
-    title: 'Tasks and activity',
+    title: 'Run history',
     description:
-      'View task requests, child experts, tool calls, approval results, and token usage across all projects.'
+      'Review execution details by project, task, and conversation, or browse the activity timeline and model usage.'
+  },
+  tabs: {
+    ariaLabel: 'Run history views',
+    tasks: 'Tasks and conversations',
+    timeline: 'Activity timeline',
+    usage: 'Usage analytics'
   },
   clear: {
     confirmAriaLabel: 'Confirm clearing activity history',
@@ -34,7 +40,7 @@ export const activity = {
   filters: {
     all: 'All',
     active: 'In progress',
-    failed: 'Failed',
+    failed: 'Exceptions',
     ariaLabel: 'Filter activity',
     clear: 'Clear filter'
   },
@@ -69,7 +75,32 @@ export const activity = {
     ariaLabel: 'Activity totals',
     all: 'All',
     active: 'In progress',
-    failed: 'Failed'
+    failed: 'Exceptions'
+  },
+  timeline: {
+    ariaLabel: 'Parallel activity tracks grouped by project and conversation',
+    description:
+      'Every track shares the same execution order. Nodes are spread by event time. Select a node to inspect its identity and details.',
+    lanes: 'Project / conversation',
+    laneAriaLabel: 'Activity track for conversation {{title}}',
+    nodeAriaLabel: '{{actor}}, {{kind}}, {{status}}, {{title}}, {{time}}',
+    legendAriaLabel: 'Activity node identity legend',
+    detailAriaLabel: 'Selected activity node details',
+    closeDetail: 'Close details',
+    actors: {
+      user: 'User',
+      assistant: 'GoodBuddy',
+      subagent: 'Child expert',
+      tool: 'Tool',
+      approval: 'Approval'
+    },
+    nodes: {
+      user: 'U',
+      assistant: 'G',
+      tool: 'T',
+      approval: 'A',
+      subagent: 'S'
+    }
   },
   empty: {
     active: 'There is no pending or running activity.',
@@ -87,6 +118,8 @@ export const activity = {
       'The scope could not be determined when this activity was recorded.',
     conversation: 'Conversation: {{title}}',
     activityCount: 'Activity items: {{formattedCount}}',
+    projectSummary:
+      '{{conversationCount}} tasks or conversations · {{activityCount}} activity items',
     openConversation: 'Open conversation'
   }
 } satisfies TranslationShape<typeof chineseActivity>

src/renderer/src/i18n/locales/en-US/app.ts

@@ -46,7 +46,7 @@ export const app = {
     magicNotes: 'Magic Notes',
     knowledge: 'Knowledge',
     heartbeat: 'Smart Heartbeat',
-    activity: 'Tasks & Activity',
+    activity: 'Run history',
     pendingSuggestions: '{{count}} pending suggestions'
   },
   route: {

src/renderer/src/i18n/locales/zh-CN/activity.ts

@@ -1,9 +1,15 @@
 export const activity = {
   header: {
-    eyebrow: 'ACTIVITY AUDIT',
+    eyebrow: 'RUN HISTORY',
-    title: '任务与活动',
+    title: '运行记录',
     description:
-      '查看全部项目中的任务请求、子专家、工具调用、审批结果和 Token 用量。'
+      '按项目、任务与会话查看执行详情，或浏览活动时间线和模型用量。'
+  },
+  tabs: {
+    ariaLabel: '运行记录视图',
+    tasks: '任务与会话',
+    timeline: '活动时间线',
+    usage: '用量统计'
   },
   clear: {
     confirmAriaLabel: '确认清空 {{formattedCount}} 条活动记录',
@@ -31,7 +37,7 @@ export const activity = {
   filters: {
     all: '全部',
     active: '进行中',
-    failed: '失败',
+    failed: '异常',
     ariaLabel: '筛选活动',
     clear: '清除筛选'
   },
@@ -66,7 +72,32 @@ export const activity = {
     ariaLabel: '活动统计',
     all: '全部',
     active: '进行中',
-    failed: '失败'
+    failed: '异常'
+  },
+  timeline: {
+    ariaLabel: '按项目和会话分组的并行活动轨道',
+    description:
+      '所有轨道共享同一执行顺序，节点按发生时间依次展开，点击节点查看身份和活动详情。',
+    lanes: '项目 / 会话',
+    laneAriaLabel: '会话 {{title}} 的活动轨道',
+    nodeAriaLabel: '{{actor}}，{{kind}}，{{status}}，{{title}}，{{time}}',
+    legendAriaLabel: '活动节点身份图例',
+    detailAriaLabel: '选中的活动节点详情',
+    closeDetail: '关闭详情',
+    actors: {
+      user: '用户',
+      assistant: 'GoodBuddy',
+      subagent: '子专家',
+      tool: '工具',
+      approval: '审批'
+    },
+    nodes: {
+      user: '用',
+      assistant: 'G',
+      tool: '工',
+      approval: '审',
+      subagent: '专'
+    }
   },
   empty: {
     active: '当前没有等待中或正在运行的活动。',
@@ -83,6 +114,8 @@ export const activity = {
       '创建此活动记录时未能确定其归属范围。',
     conversation: '对话：{{title}}',
     activityCount: '{{formattedCount}} 条活动',
+    projectSummary:
+      '{{conversationCount}} 个任务或会话 · {{activityCount}} 条活动',
     openConversation: '打开所属对话'
   }
 } as const

src/renderer/src/i18n/locales/zh-CN/app.ts

@@ -42,7 +42,7 @@ export const app = {
     magicNotes: '魔法笔记',
     knowledge: '知识库',
     heartbeat: '智能心跳',
-    activity: '任务与活动',
+    activity: '运行记录',
     pendingSuggestions: '{{count}} 条待处理建议'
   },
   route: {

src/renderer/src/styles.css

@@ -8445,6 +8445,16 @@ details.settings-section > :not(summary) + :not(summary) {
   width: 100%;
   min-height: 100%;
   flex-direction: column;
+  container: activity-panel / inline-size;
+}
+
+.activity-panel > .page-tabs {
+  padding: var(--space-4) 0;
+}
+
+.activity-panel__tab-panel {
+  min-width: 0;
+  padding-bottom: var(--space-6);
 }
 
 .activity-list {
@@ -8458,7 +8468,6 @@ details.settings-section > :not(summary) + :not(summary) {
   padding: 14px;
   border: 1px solid var(--border-default);
   border-radius: var(--radius-card);
-  margin-top: var(--space-4);
   background: var(--surface-raised);
 }
 
@@ -8468,11 +8477,11 @@ details.settings-section > :not(summary) + :not(summary) {
   gap: 12px;
 }
 
-.token-usage__header h3 {
+.token-usage__header h2 {
   flex: 1;
   margin: 0;
   color: var(--text-primary);
-  font-size: 13px;
+  font-size: var(--font-section-title);
 }
 
 .token-usage__stats {
@@ -8561,7 +8570,7 @@ details.settings-section > :not(summary) + :not(summary) {
 
 .activity-panel__stats {
   display: grid;
-  margin: 18px 0 14px;
+  margin: 0 0 var(--space-3);
   gap: 9px;
   grid-template-columns: repeat(3, 1fr);
 }
@@ -8585,22 +8594,54 @@ details.settings-section > :not(summary) + :not(summary) {
   font-weight: 700;
 }
 
-.activity-panel__filters {
+.activity-panel__toolbar {
   display: flex;
   flex-wrap: wrap;
-  margin-bottom: 12px;
+  align-items: flex-start;
-  gap: 6px;
+  justify-content: space-between;
+  margin-bottom: var(--space-3);
+  gap: var(--space-3);
 }
 
-.activity-groups {
+.activity-projects {
   display: grid;
+  gap: var(--space-4);
+}
+
+.activity-project {
+  overflow: clip;
+  border: 1px solid var(--border-default);
+  border-radius: var(--radius-card);
+  background: var(--surface-raised);
+}
+
+.activity-project__header {
+  display: flex;
+  min-height: 44px;
+  align-items: center;
+  justify-content: space-between;
+  padding: var(--space-2) var(--space-4);
+  border-bottom: 1px solid var(--border-subtle);
+  background: var(--surface-subtle);
   gap: var(--space-3);
 }
 
+.activity-project__header > span:last-child {
+  color: var(--text-muted);
+  font-size: var(--font-caption);
+}
+
+.activity-conversations {
+  display: grid;
+  padding: var(--space-3);
+  background: var(--surface-canvas);
+  gap: var(--space-2);
+}
+
 .activity-group {
   overflow: clip;
   border: 1px solid var(--border-default);
-  border-radius: var(--radius-card);
+  border-radius: var(--radius-control);
   background: var(--surface-raised);
 }
 
@@ -8648,11 +8689,15 @@ details.settings-section > :not(summary) + :not(summary) {
 .activity-group > .activity-list {
   display: grid;
   padding: var(--space-3);
-  background: var(--surface-canvas);
+  border-top: 1px solid var(--border-subtle);
   gap: var(--space-2);
 }
 
-.activity-group .activity-item {
+.activity-list__item {
+  list-style: none;
+}
+
+.activity-list__item .activity-item {
   margin-bottom: 0;
 }
 
@@ -8725,6 +8770,23 @@ details.settings-section > :not(summary) + :not(summary) {
   white-space: pre-wrap;
 }
 
+.activity-item__context {
+  display: flex;
+  min-width: 0;
+  flex-wrap: wrap;
+  align-items: center;
+  margin-top: var(--space-2);
+  color: var(--text-muted);
+  font-size: var(--font-caption);
+  gap: var(--space-2);
+}
+
+.activity-item__context > span:first-child {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
 .activity-item__conversation {
   padding: 5px 0;
   margin-top: 7px;
@@ -8735,6 +8797,305 @@ details.settings-section > :not(summary) + :not(summary) {
   font-weight: 650;
 }
 
+.activity-tracks {
+  display: grid;
+  min-width: 0;
+  gap: var(--space-3);
+}
+
+.activity-tracks__description {
+  padding: var(--space-2) var(--space-3);
+  border-radius: var(--radius-control);
+  margin: 0;
+  background: var(--surface-subtle);
+  color: var(--text-secondary);
+  font-size: var(--font-caption);
+  line-height: 1.5;
+}
+
+.activity-tracks__legend {
+  display: flex;
+  padding: 0;
+  margin: 0;
+  color: var(--text-secondary);
+  flex-wrap: wrap;
+  font-size: var(--font-caption);
+  gap: var(--space-3);
+  list-style: none;
+}
+
+.activity-tracks__legend li {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--space-1);
+}
+
+.activity-tracks__legend-swatch {
+  width: 10px;
+  height: 10px;
+  border-radius: 50%;
+  background: var(--accent-solid);
+}
+
+.activity-tracks__legend-swatch--assistant {
+  background: var(--success);
+}
+
+.activity-tracks__legend-swatch--subagent {
+  background: var(--warning);
+}
+
+.activity-tracks__legend-swatch--tool {
+  background: color-mix(
+    in srgb,
+    var(--accent) 55%,
+    var(--success)
+  );
+}
+
+.activity-tracks__legend-swatch--approval {
+  border-radius: 3px;
+  background: color-mix(
+    in srgb,
+    var(--warning) 65%,
+    var(--danger)
+  );
+}
+
+.activity-tracks__scroll {
+  max-width: 100%;
+  border: 1px solid var(--border-default);
+  border-radius: var(--radius-card);
+  overflow-x: auto;
+  background: var(--surface-raised);
+}
+
+.activity-tracks__canvas {
+  width: 100%;
+  min-width: 760px;
+}
+
+.activity-tracks__axis {
+  display: grid;
+  min-height: 38px;
+  align-items: center;
+  padding: 0 var(--space-3);
+  border-bottom: 1px solid var(--border-subtle);
+  color: var(--text-muted);
+  font-size: var(--font-caption);
+  grid-template-columns: 210px minmax(0, 1fr) auto;
+}
+
+.activity-tracks__axis strong {
+  position: sticky;
+  z-index: 3;
+  left: var(--space-3);
+  padding-right: var(--space-3);
+  background: var(--surface-raised);
+  color: var(--text-secondary);
+}
+
+.activity-tracks__axis span:nth-child(2) {
+  padding-left: var(--space-3);
+}
+
+.activity-tracks__project > header {
+  display: flex;
+  min-height: 38px;
+  align-items: center;
+  justify-content: space-between;
+  padding: var(--space-2) var(--space-3);
+  border-bottom: 1px solid var(--border-subtle);
+  background: var(--surface-subtle);
+  gap: var(--space-3);
+}
+
+.activity-tracks__project > header > span:last-child {
+  color: var(--text-muted);
+  font-size: var(--font-caption);
+}
+
+.activity-track {
+  display: grid;
+  min-height: 84px;
+  border-bottom: 1px solid var(--border-subtle);
+  grid-template-columns: 210px minmax(0, 1fr);
+}
+
+.activity-tracks__project:last-child .activity-track:last-child {
+  border-bottom: 0;
+}
+
+.activity-track__label {
+  position: sticky;
+  z-index: 2;
+  left: 0;
+  display: grid;
+  min-width: 0;
+  align-content: center;
+  padding: var(--space-2) var(--space-3);
+  border-right: 1px solid var(--border-subtle);
+  background: var(--surface-raised);
+  gap: var(--space-1);
+}
+
+.activity-track__label > strong {
+  overflow: hidden;
+  color: var(--text-primary);
+  font-size: var(--font-body);
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.activity-track__label > span {
+  display: flex;
+  align-items: center;
+  color: var(--text-muted);
+  font-size: var(--font-caption);
+  gap: var(--space-2);
+}
+
+.activity-track__rail {
+  position: relative;
+  min-width: 0;
+  background-image: linear-gradient(
+    to right,
+    var(--border-subtle) 1px,
+    transparent 1px
+  );
+  background-size: 20% 100%;
+}
+
+.activity-track__rail::before {
+  position: absolute;
+  top: 50%;
+  right: var(--space-3);
+  left: var(--space-3);
+  height: 2px;
+  background: var(--border-default);
+  content: '';
+  transform: translateY(-50%);
+}
+
+.activity-track__node {
+  position: absolute;
+  z-index: 1;
+  top: 50%;
+  display: flex;
+  width: 68px;
+  height: 58px;
+  padding: 0;
+  border: 0;
+  background: transparent;
+  color: var(--text-secondary);
+  cursor: pointer;
+  align-items: center;
+  flex-direction: column;
+  font-size: 10px;
+  gap: 2px;
+  transform: translate(-50%, -50%);
+}
+
+.activity-track__node:hover {
+  z-index: 3;
+  color: var(--text-primary);
+  transform: translate(-50%, -50%) scale(1.05);
+}
+
+.activity-track__node:focus-visible {
+  z-index: 4;
+  outline: 2px solid var(--accent);
+  outline-offset: 2px;
+}
+
+.activity-track__node > span {
+  display: grid;
+  width: 32px;
+  height: 32px;
+  border: 2px solid var(--surface-raised);
+  border-radius: 50%;
+  background: var(--accent-solid);
+  color: var(--text-on-accent);
+  font-weight: 750;
+  place-items: center;
+}
+
+.activity-track__node > small {
+  display: block;
+  width: 100%;
+  overflow: hidden;
+  font-size: 9px;
+  line-height: 1.2;
+  text-align: center;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.activity-track__node[aria-pressed='true'] > span {
+  box-shadow: 0 0 0 3px var(--accent-selected);
+}
+
+.activity-track__node--actor-assistant > span {
+  background: var(--success);
+}
+
+.activity-track__node--actor-subagent > span {
+  background: var(--warning);
+  color: var(--text-primary);
+}
+
+.activity-track__node--actor-tool > span {
+  background: color-mix(
+    in srgb,
+    var(--accent) 55%,
+    var(--success)
+  );
+}
+
+.activity-track__node--actor-approval > span {
+  border-radius: 6px;
+  background: color-mix(
+    in srgb,
+    var(--warning) 65%,
+    var(--danger)
+  );
+}
+
+.activity-track__node--running > span {
+  box-shadow: 0 0 0 3px var(--accent-selected);
+}
+
+.activity-track__node--failed > span,
+.activity-track__node--denied > span,
+.activity-track__node--cancelled > span,
+.activity-track__node--interrupted > span {
+  border-color: var(--danger);
+  box-shadow: 0 0 0 2px var(--danger-subtle);
+}
+
+.activity-track__node--pending > span {
+  border-color: var(--accent);
+  background: var(--surface-raised);
+  color: var(--accent);
+}
+
+.activity-tracks__detail {
+  display: grid;
+  padding: var(--space-3);
+  border: 1px solid var(--border-default);
+  border-radius: var(--radius-card);
+  background: var(--surface-subtle);
+  gap: var(--space-2);
+}
+
+.activity-tracks__detail > .secondary-button {
+  justify-self: end;
+}
+
+.activity-tracks__detail .activity-item {
+  margin: 0;
+}
+
 .heartbeat-center {
   display: flex;
   width: 100%;
@@ -9820,6 +10181,9 @@ details.settings-section > :not(summary) + :not(summary) {
     grid-template-columns: 1fr;
   }
 
+}
+
+@container activity-panel (max-width: 720px) {
   .activity-group > summary {
     grid-template-columns: minmax(0, 1fr) auto;
   }
@@ -9827,6 +10191,35 @@ details.settings-section > :not(summary) + :not(summary) {
   .activity-group > summary time {
     grid-column: 1 / -1;
   }
+
+  .activity-panel__toolbar {
+    align-items: stretch;
+    flex-direction: column;
+  }
+
+  .activity-panel__toolbar > .segmented-control {
+    width: fit-content;
+  }
+}
+
+@container activity-panel (max-width: 480px) {
+  .activity-panel__stats {
+    grid-template-columns: 1fr;
+  }
+
+  .activity-project__header {
+    align-items: flex-start;
+    flex-direction: column;
+  }
+
+  .activity-conversations {
+    padding: var(--space-2);
+  }
+
+  .activity-item__context > span:first-child {
+    width: 100%;
+    white-space: normal;
+  }
 }
 
 @container heartbeat-center (max-width: 620px) {